package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RegexUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;

import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.*;
import static com.hmdp.utils.SystemConstants.USER_NICK_NAME_PREFIX;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {

    @Resource
    private StringRedisTemplate stringRedisTemplate;

    @Override
    public Result sendCode(String phone, HttpSession session) {
        //手机号校验
        if (RegexUtils.isPhoneInvalid(phone)) {
            return Result.fail("手机号码格式错误");
        }

        //验证码生成
        String code = RandomUtil.randomNumbers(6);

        //保存验证码到redis
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY+phone, code,LOGIN_CODE_TTL, TimeUnit.MINUTES);

        //发送验证码
        log.debug("发送验证码成功："+code);
        return Result.ok();
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        //手机号校验
        String phone = loginForm.getPhone();
        if (RegexUtils.isPhoneInvalid(phone)) {
            return Result.fail("手机号码格式错误");
        }

        //验证码校验
        String code = loginForm.getCode();
        if (code == null || !code.equals(stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY+phone))){
            return Result.fail("验证码错误");
        }

        //验证用户是否存在
        User user = query().eq("phone", phone).one();
          //不存在，新建用户存入数据库
        if (user == null){
            user = new User();
            user.setPhone(phone);
            user.setNickName(USER_NICK_NAME_PREFIX+RandomUtil.randomString(6));
            save(user);
        }

        //生成随机token
        String token = UUID.randomUUID().toString(true);

        //存入redis
        Map<String, Object> map = new HashMap<>();
        map.put("id",String.valueOf(user.getId()));
        map.put("nickName",user.getNickName());
        map.put("icon",user.getIcon());
        stringRedisTemplate.opsForHash().putAll(LOGIN_USER_KEY+token, map);

        //设置token有效期
        stringRedisTemplate.expire(LOGIN_USER_KEY+token,LOGIN_USER_TTL,TimeUnit.MINUTES);

        return Result.ok(token);
    }
}
